Filtering non-primitive types with hibernate

Question

In my database I do not delete objects. Instead a soft delete is done. Means a delted flag is set to true. This should be filtered by hibernate using the @Filter annotation. This works but I have the problem that fields are not filtered.

For example I have a child class and a parent class which contains a child. If the child gets deleted and the parent gets loaded the parent object contains the child object (although the deleted flag is set correctly). But I want the child object to be filtered like it works with collections. Is there any way to do that?

I tried treating the field like a collecting but this didn't work for me.

@Entity
@FilterDef(name = deletedFilter, parameters = @ParamDef(name = deletedParam, type = "boolean"))
@Filter(name = deletedFilter, condition = ":deletedParam = deleted")
public class Child {}


@Entity
public class Parent {
    @OneToOne
    @Filter(name = deletedFilter, condition = ":deletedParam = deleted")
    private Child child = new Child();
} 

Answer 1

Hibernate filters are not working on @OneToOne relations.

https://hibernate.onjira.com/browse/HHH-4026

The explanation is on the comments to the issue: filters would change the cardinality of the relation.

Answer 2

If the boolean flag doesn't work you can use Integer value instead. And can check accordingly.